Wave Optics - Result Question 34

37. In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9cm respectively. What is the actual distance of separation?

[1996]

(a) 12.5cm

(b) 12cm

(c) 13cm

(d) 14cm

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Answer:

Correct Answer: 37. (b)

Solution:

  1. (b) Separation between slits are (r1=)16cm and (r2=)9cm.

Actual distance of separation =r1r2

=16×9=12cm



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